CK 625 then AA 3012 at O'Hare
Seattle (SEA) → Chicago → Pittsburgh
Timetable, Chicago time
17:00CK 625 from Seattle (SEA) at the gate
16:59AA 3012 to Pittsburgh leaves the gate
23 h 59 apart on the timetable, overnight
AA 3012 leaves 23 h 59 after CK 625 arrives on the timetable: more than half a day, so not a connection we count.